id	Quotes from tromp
#1	When the block subsidy becomes insignificant in a decade or two, the only thing that will keep bitcoin secure is high total fees for every block, and that can only be achieved by keeping the network congested.
#2	The biggest downsides of privacy tech like ZCash and Monero is that they hugely hurt scalability, not just by having much larger transactions, but also by making it impossible to identify the UTXO set. Because you never know when outputs are spent, you have to maintain the entire TXO set (i.e. not only store but be able to efficiently index it) all the time.
#3	If Bitcoin is to achieve any sort of mainstream adoption, and actual use as a currency, then most users will eventually be far more familiar with the interactive nature of L2 transactions than the non-interactive nature of L1.
#4	It seems most Zcash users are not interested in its privacy features, but hope to profit from other people's interest in its privacy features.